A1344.[COCI-2007_2008-contest4]#6 VECI

Your program will be given an integer X. Find the smallest number larger than X consisting of the same digits as X.

The first line of input contains the integer X (1 ≤ X ≤ 999999).
The first digit in X will not be a zero.

Output the result on a single line. If there is no such number, output
0.